PureFlow AirDog DF-165-4G - GM Duramax 2015+ - Manual (Page 18)

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AirDog®
WATER
SEPARATOR
PureFlow AirDog
AirDog
®
II-4G 2015 and UP DuraMax Diesel
Section 8 Fuel Filter & Water Separator
Filter Service Recommendations
Plugging of either the fuel filter or the water separator itself will cause low fuel pressure and low
flow to the engine. If a low fuel pressure issue exists, replace the fuel filter. Typical fuel filter
life is 15-20k miles depending on fuel quality.
AirDog®
2 Micron Fuel Filter
Drain Valve
The Water Separator
Replace the water separator every other time you change the Fuel Filter or if it becomes damaged
or plugged. It is suggested to check/drain the water separator every three months or as needed
should you experience excessive ‘water in fuel’ conditions. When installing the water separator,
be sure to clean the underside of the AirDog II base. Follow the instructions printed on the pre-
filter for proper tightening procedures.
CAUTION: Be extremely careful to prevent any contaminates or debris from entering the pre-
filter when removing it for cleaning! Large debris will jam the Gerotor and cause the fuse to
blow. This is not a warranty item. Should this happen, you can easily put the system back into
working order. See the instructions on “How to clean the Gerotor” for proper procedures
.
The Fuel Filter
Remove the fuel filter by turning it counter clockwise. Do not pre-fill the fuel filter with fuel.
The AirDog II will fill the filter and prime the system automatically. Follow the instructions on
the filter for proper tightening procedures.
CAUTION: Dispose of waste fuel and used filters properly to protect OUR environment!